# SDR AALA201906259016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2019
- Submitted: June 25, 2019
- Operation: Air carrier
- Aircraft: [N156AN](https://openairdocs.org/aircraft/N156AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6983
- Aircraft time: 10,917 hours, 4,204 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Part serial: 796397
- Condition: No Test
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201906259016

## Discrepancy

AIRCRAFT IN BASE VISIT: MAINTENANCE REPORTS EMERGENCY POWER SUPPLY UNITS 12WL AND 14WL BATTERIES FAILED CIDS1-SYSTEM TEST 1-EPSU SYSTEM  TEST IN REFERENCE WITH JOB CARD 26L00005062. REMOVED AND REPLACED 12WL & 14WL EMERGENCY POWER SUPPLY UNIT BATTERIES IAW AMM 33-51-38, OPERATIONAL TEST AND EPSU SYSTEM TEST PASSED. (SEE SDR # AALA201906249042)

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